Answer :

If oxygen stops to support combustion then there will be no fire because oxygen is essential to carry out combustion. It can be seen from the activity of burning candle in which the candle flame goes off on covering with a glass tumbler as it cuts off the supply of oxygen.

Fuels can also be used for other non-combustion purposes. Petrochemicals obtained from petroleum are used for following purposes:

● They are used in manufacturing of plastics, detergents.

● They are used as lubricants.

● They are used to make fertilizers.

● Paraffin wax is used in ointments, skin creams etc.

● Coal tar from coal is used in roads, paints, synthetic dyes etc.

So fuels can be used in agricultural sector, industrial sector, domestic and other sectors for non-combustion uses also.

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